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<div class="title">reduction/threadblock_swizzle.h</div>  </div>
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<a href="reduction_2threadblock__swizzle_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/***************************************************************************************************</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">* Copyright (c) 2017-2019, NVIDIA CORPORATION.  All rights reserved.</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">*</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">* Redistribution and use in source and binary forms, with or without modification, are permitted</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">* provided that the following conditions are met:</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">*     * Redistributions of source code must retain the above copyright notice, this list of</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">*       conditions and the following disclaimer.</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">*     * Redistributions in binary form must reproduce the above copyright notice, this list of</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">*       conditions and the following disclaimer in the documentation and/or other materials</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">*       provided with the distribution.</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">*     * Neither the name of the NVIDIA CORPORATION nor the names of its contributors may be used</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">*       to endorse or promote products derived from this software without specific prior written</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">*       permission.</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">*</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS &quot;AS IS&quot; AND ANY EXPRESS OR</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment">* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE</span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment">* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment">* STRICT LIABILITY, OR TOR (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment">* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment">*</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment">**************************************************************************************************/</span></div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="preprocessor">#pragma once</span></div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="coord_8h.html">cutlass/coord.h</a>&quot;</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacecutlass.html">cutlass</a> {</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keyword">namespace </span>reduction {</div><div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html">   33</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html">DefaultBlockSwizzle</a> {</div><div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#a1ad8edda7b73d23fb5592a531f5736cc">   35</a></span>&#160;  <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a> <a class="code" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#a1ad8edda7b73d23fb5592a531f5736cc">DefaultBlockSwizzle</a>() {}</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div><div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#ae77863b3e53fa349945fafcd45ac39fa">   38</a></span>&#160;  CUTLASS_DEVICE dim3 <a class="code" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#ae77863b3e53fa349945fafcd45ac39fa">swizzle</a>() { <span class="keywordflow">return</span> blockIdx; }</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#a70bdfa46a246b4fd6d000ffefe8778e4">   41</a></span>&#160;  <a class="code" href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a> dim3 <a class="code" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#a70bdfa46a246b4fd6d000ffefe8778e4">get_grid_layout</a>(<a class="code" href="structcutlass_1_1Coord.html">Coord&lt;3&gt;</a> <span class="keyword">const</span> &amp;problem_size,</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;                                           <a class="code" href="structcutlass_1_1Coord.html">Coord&lt;3&gt;</a> <span class="keyword">const</span> &amp;OutputTile) {</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    assert(OutputTile[0] == 1 &amp;&amp; OutputTile[1] == 1);</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    assert((problem_size[0] * problem_size[1] * problem_size[2]) % OutputTile[2] == 0);</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    dim3 grid;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    grid.x = problem_size[0] * problem_size[1] * problem_size[2]</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;      / OutputTile[2] ;</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    <span class="keywordflow">return</span> grid;</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;  }</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;</div><div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#ac4e26c28b5b715340a399e86213ae4d1">   52</a></span>&#160;  CUTLASS_DEVICE <a class="code" href="structcutlass_1_1Coord.html">Coord&lt;3&gt;</a> <a class="code" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#ac4e26c28b5b715340a399e86213ae4d1">get_threadblock_offset</a>(<a class="code" href="structcutlass_1_1Coord.html">Coord&lt;3&gt;</a> <span class="keyword">const</span> &amp;SubTile) {</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    assert(SubTile[0] == 1 &amp;&amp; SubTile[1] == 1);</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    dim3 block = <a class="code" href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#ae77863b3e53fa349945fafcd45ac39fa">swizzle</a>();</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    <a class="code" href="structcutlass_1_1Coord.html">Coord&lt;3&gt;</a> threadblock_offset =</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;      <a class="code" href="namespacecutlass.html#a7419519fa453a121dfa5f26bf87318d9">make_Coord</a>(0, 0, block.x * SubTile[2]);</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    <span class="keywordflow">return</span> threadblock_offset;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;  }</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;};</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;} <span class="comment">// namespace reduction</span></div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;} <span class="comment">// namespace cutlass</span></div><div class="ttc" id="structcutlass_1_1reduction_1_1DefaultBlockSwizzle_html"><div class="ttname"><a href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html">cutlass::reduction::DefaultBlockSwizzle</a></div><div class="ttdef"><b>Definition:</b> reduction/threadblock_swizzle.h:33</div></div>
<div class="ttc" id="namespacecutlass_html"><div class="ttname"><a href="namespacecutlass.html">cutlass</a></div><div class="ttdef"><b>Definition:</b> aligned_buffer.h:35</div></div>
<div class="ttc" id="structcutlass_1_1reduction_1_1DefaultBlockSwizzle_html_a1ad8edda7b73d23fb5592a531f5736cc"><div class="ttname"><a href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#a1ad8edda7b73d23fb5592a531f5736cc">cutlass::reduction::DefaultBlockSwizzle::DefaultBlockSwizzle</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE DefaultBlockSwizzle()</div><div class="ttdoc">Ctor. </div><div class="ttdef"><b>Definition:</b> reduction/threadblock_swizzle.h:35</div></div>
<div class="ttc" id="coord_8h_html"><div class="ttname"><a href="coord_8h.html">coord.h</a></div><div class="ttdoc">A Coord is a coordinate of arbitrary rank into a tensor or matrix. </div></div>
<div class="ttc" id="namespacecutlass_html_a7419519fa453a121dfa5f26bf87318d9"><div class="ttname"><a href="namespacecutlass.html#a7419519fa453a121dfa5f26bf87318d9">cutlass::make_Coord</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE Coord&lt; 1 &gt; make_Coord(int _0)</div><div class="ttdoc">Helper to make a 2-element coordinate. </div><div class="ttdef"><b>Definition:</b> coord.h:387</div></div>
<div class="ttc" id="structcutlass_1_1reduction_1_1DefaultBlockSwizzle_html_ae77863b3e53fa349945fafcd45ac39fa"><div class="ttname"><a href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#ae77863b3e53fa349945fafcd45ac39fa">cutlass::reduction::DefaultBlockSwizzle::swizzle</a></div><div class="ttdeci">CUTLASS_DEVICE dim3 swizzle()</div><div class="ttdoc">Swizzle the block index. </div><div class="ttdef"><b>Definition:</b> reduction/threadblock_swizzle.h:38</div></div>
<div class="ttc" id="structcutlass_1_1reduction_1_1DefaultBlockSwizzle_html_a70bdfa46a246b4fd6d000ffefe8778e4"><div class="ttname"><a href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#a70bdfa46a246b4fd6d000ffefe8778e4">cutlass::reduction::DefaultBlockSwizzle::get_grid_layout</a></div><div class="ttdeci">CUTLASS_HOST_DEVICE dim3 get_grid_layout(Coord&lt; 3 &gt; const &amp;problem_size, Coord&lt; 3 &gt; const &amp;OutputTile)</div><div class="ttdef"><b>Definition:</b> reduction/threadblock_swizzle.h:41</div></div>
<div class="ttc" id="cutlass_8h_html_a28c2443a142676d3d71effdae1a986b1"><div class="ttname"><a href="cutlass_8h.html#a28c2443a142676d3d71effdae1a986b1">CUTLASS_HOST_DEVICE</a></div><div class="ttdeci">#define CUTLASS_HOST_DEVICE</div><div class="ttdef"><b>Definition:</b> cutlass.h:89</div></div>
<div class="ttc" id="structcutlass_1_1Coord_html"><div class="ttname"><a href="structcutlass_1_1Coord.html">cutlass::Coord&lt; 3 &gt;</a></div></div>
<div class="ttc" id="structcutlass_1_1reduction_1_1DefaultBlockSwizzle_html_ac4e26c28b5b715340a399e86213ae4d1"><div class="ttname"><a href="structcutlass_1_1reduction_1_1DefaultBlockSwizzle.html#ac4e26c28b5b715340a399e86213ae4d1">cutlass::reduction::DefaultBlockSwizzle::get_threadblock_offset</a></div><div class="ttdeci">CUTLASS_DEVICE Coord&lt; 3 &gt; get_threadblock_offset(Coord&lt; 3 &gt; const &amp;SubTile)</div><div class="ttdef"><b>Definition:</b> reduction/threadblock_swizzle.h:52</div></div>
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